| Re: sorting string arrays - non alphabetic and user defined order [message #50652] |
Mon, 16 October 2006 05:03  |
greg michael
Messages: 163
Registered: January 2006
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Senior Member |
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Try this...
namelist=['Daddy','Groggy','Ally','Curry','Emmy','Bully','Jo ckey','Hippy','Itchy','Fluffy']
mylist=['Emmy','Fluffy','Itchy','Jockey']
n=n_elements(namelist)
m=n_elements(mylist)
q1=rebin(transpose(indgen(m)),n,m)
q2=rebin(indgen(n),n,m)
s=mylist[q1] eq namelist[q2]
print,namelist[where(total(s,2) gt 0)]
regards,
Greg
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| Re: sorting string arrays - non alphabetic and user defined order [message #50827 is a reply to message #50652] |
Mon, 16 October 2006 21:42  |
rkombiyil
Messages: 59
Registered: March 2006
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Member |
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Hi Greg,
Thank you for your quick response, it is much appreciated. Your method
works fine. I am afraid I left out of couple of questions related to
the problem.
Is there a way to dynamically allocate arrays ( varying size) ?
Specifically, this is what I am trying to do.
#1
I have a station database. This "string" array contains details
pertaining to all the stations (names,locations,code etc.). Let's call
this NAMELIST 'A'
#2
Now, I made a list of stations I want to look at from the above
database. Let's call this NAMELIST 'B'
#3
The list of stations provided to me (NAMELIST 'C') may or may not
contain all the stations in namelist 'B'
#4
I make a 1-1 string match between namelists 'B' and 'C' and extract
only those stations that are present in B and C, and order C similar to
B (user defined non-alphabetic)
#5
Problem is: I know the dimensions of the string array 'B' because I get
to choose the stations I want from the original big database. Now, I
don't know the dimensions of 'C' because it is variable, it may have
same dimensions as B or less than B or none at all and the order might
vary. Since, it can "ALSO" have same dimensions of B (max possible
dimension), I define
C=strarr(n_elements(B))
But when the dimensions are less than that in B, there are elements
with 'strlen' equal to zero. For example, C[3] maybe empty and may be
C[7] and all other elements of the array may be filled.. I want to get
rid of these trailing/beginning/in between empty (zero length) elements
(I know this is because of the above declaration)
and make this array to have dimensions = # of non-zero elements
Is there a way to tackle such situations? I tried to index and
increment the # of non-zero elements and redeclare the dimensions of C
to be # of non-zero elements.. But it didn't work.. Meanwhile, I will
try to modify your code to see if it works for my need.
I appreciate your time and help!
Thanks much,
~rk
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